CosmoZooo wrote: After trying it though, I've decided that I'd rather do it with my finger...

Absolutely! The trick is how you hold the camera. Here's how I do it (as shown in my Instructable):

Note which finger is being used to press the shutter button....

It takes a little getting used to, but it's quite effortless after a little practice and even allows adjusting the tilt for each shot. A little more forward for subjects at greater distance in front of the camera gives less light loss, and it's easy to aim at specific ceiling areas to avoid objects up there that could give a color cast, etc.